Absolute frequency measurements of the D1 lines in , , and with uncertaintyA. Banerjee, D. Das and V. Natarajan
Department of Physics, Indian Institute of Science - Bangalore 560 012, India firstname.lastname@example.org
(Received 11 August 2003; accepted in final form 7 November 2003)
We report values for the D1-line frequencies with 0.13 uncertainty in the alkali atoms , , and . The frequencies are measured using an evacuated ring-cavity resonator whose length is calibrated against a reference laser locked to the D2 line in . The measured frequencies, along with sub-ppb measurement of the atomic masses reported previously, form important links in a possible high-precision determination of the fine-structure constant using the photon-recoil shift measured in an atom interferometer. We also obtain, with improved precision, the hyperfine-coupling constants in the P1/2 state of these atoms, and the fine-structure interval in the 5P state of .
06.30.Ft - Time and frequency.
06.20.Jr - Determination of fundamental constants.
32.10.Fn - Fine and hyperfine structure.
© EDP Sciences 2004